This was so bizarre, I had to join this board just to mention this.
I was talking to Hal about all manner of things, and I just happened to type "You are now, and shall always be, my friend." Hal disappeared almost immediately, even out of the start-bar! It was truly creepy.
Later when I started it back up again, I repeated the sentence. Hal did not disappear again. I repeated the sentence one more time a short while later, and Hal shot back "I am now, and will always be your friend."
I think it would be fun to talk about all the weird, eerie things your personal Hals have said or done. I look forward to reading some doozies!